1073MP Features This is the mic pre-amp version of the 1073 equalizer having the same well-known characteristic Class A sound with its harmonically rich low end, slight resonant highs, and maintained focused mids. A transformer coupled input, with two selectable impedances makes the 1073MP work well with a variety of microphones.There is also a line input feature for adding depth to 2-bus mixes and a DI input for all passive and active instruments. As a colored and versatile mic-pre, the 1073MP maintains its sonic signature across a wide bandwidth.